Here's a breakdown of what happens:

* Seedling Stage: This is the initial stage of a plant's life, starting from when the seed germinates. The seedling develops its first true leaves and roots.

* Juvenile Stage: The plant grows taller and stronger, developing more leaves and a root system.

* Mature Stage: The plant reaches its full size and is capable of flowering and producing seeds.

The specific type of mature plant a seedling will become depends on the species of the seed. For example:

* A sunflower seed will grow into a sunflower plant.

* A tomato seed will grow into a tomato plant.

* A maple seed will grow into a maple tree.

Let me know if you have any other questions!